{
  "study": "The AI Outage Ledger: Every Dated Outage at ChatGPT, Claude, Gemini, Copilot and Grok, and the Cloud Layers They Share",
  "url": "https://provenbrief.com/story/the-ai-outage-ledger-every-dated-outage-at-chatgpt-claude-gemini-copilot-and-gro",
  "publisher": "ProvenBrief",
  "contentUpdatedAt": "2026-09-22T04:46:14.338Z",
  "terms": "Free to use with attribution to ProvenBrief and a link to the source page.",
  "tables": [
    {
      "key": "shared-layer-ledger",
      "title": "The shared-layer ledger: dated incidents and the assistants they hit",
      "measure": "Number of the five major AI assistants (ChatGPT, Claude, Gemini, Copilot, Grok) affected by the dated incident",
      "unit": "assistants affected",
      "rows": [
        {
          "key": "sep3-2026",
          "label": "Sep 3 2026: ChatGPT, Claude, Grok down; Copilot flagged",
          "value": 4,
          "note": "Cause contested: Azure East US vs SpaceXAI Memphis compute center; Gemini largely upright",
          "source": "https://shattered.io/chatgpt-claude-grok-outage-azure-2026/"
        },
        {
          "key": "sep15-2026",
          "label": "Sep 15 2026: Claude model errors hit Claude and Copilot",
          "value": 2,
          "note": "Anthropic investigating 09:48 UTC; GitHub logged Copilot degradation at 09:47 UTC",
          "source": "https://status.anthropic.com"
        },
        {
          "key": "sep16-2026",
          "label": "Sep 16 2026: two Google-layer failures hit Claude and Copilot",
          "value": 2,
          "note": "Google Play broke Claude subscriptions; Copilot Gemini 3.8 Flash degraded separately",
          "source": "https://status.anthropic.com"
        },
        {
          "key": "sep17-2026",
          "label": "Sep 17 2026: Copilot GPT-5.6 and GPT-6 model surfaces failed",
          "value": 1,
          "note": "Upstream model provider issue; OpenAI logged API-model errors the same evening",
          "source": "https://www.githubstatus.com"
        },
        {
          "key": "sep14-2026",
          "label": "Sep 14 2026: Claude Cowork on Windows broke on a Microsoft Windows update",
          "value": 1,
          "note": "Update shipped Sep 8; fixed by Microsoft patch KB5129195",
          "source": "https://status.anthropic.com"
        },
        {
          "key": "apr15-2026",
          "label": "Apr 15 2026: Claude outage, 30,000+ peak reports",
          "value": 1,
          "note": "40 minutes major outage plus 73 minutes partial outage per status monitor",
          "source": "https://esovitae.com/the-april-2026-claude-outage-anatomy-of-an-ai-infrastructure-mystery/"
        },
        {
          "key": "jun16-2026",
          "label": "Jun 16 2026: Claude outage, 2,103 peak reports",
          "value": 1,
          "note": "Sonnet and Opus models at roughly 10 percent error rates",
          "source": "https://www.cnet.com/news-live/claude-outage-anthropic-status-june-16-2026/"
        },
        {
          "key": "apr20-2026",
          "label": "Apr 20 2026: ChatGPT, Codex and API Platform partial outage",
          "value": 1,
          "note": "Routing layer; peak 8,700 reports UK, 1,900 US",
          "source": "https://esovitae.com/the-april-2026-claude-outage-anatomy-of-an-ai-infrastructure-mystery/"
        },
        {
          "key": "feb27-2026",
          "label": "Feb 27 2026: Gemini API error spike on Vertex AI global endpoint",
          "value": 1,
          "note": "Between 04:37 and 06:35 Pacific",
          "source": "https://esovitae.com/the-april-2026-claude-outage-anatomy-of-an-ai-infrastructure-mystery/"
        }
      ]
    },
    {
      "key": "openai-90day-uptime",
      "title": "OpenAI trailing-90-day component uptime, June to September 2026",
      "measure": "Vendor-published trailing-90-day uptime for the component",
      "unit": "percent",
      "rows": [
        {
          "key": "chatgpt",
          "label": "ChatGPT (15 components)",
          "value": 99.63,
          "source": "https://status.openai.com"
        },
        {
          "key": "apis",
          "label": "APIs (12 components)",
          "value": 99.93,
          "source": "https://status.openai.com"
        },
        {
          "key": "login",
          "label": "Login",
          "value": 99.995,
          "source": "https://status.openai.com"
        },
        {
          "key": "sora",
          "label": "Sora",
          "value": 99.97,
          "source": "https://status.openai.com"
        },
        {
          "key": "conversations",
          "label": "Conversations",
          "value": 99.96,
          "source": "https://status.openai.com"
        },
        {
          "key": "chatgpt-work",
          "label": "ChatGPT Work",
          "value": 99.84,
          "source": "https://status.openai.com"
        },
        {
          "key": "image-generation",
          "label": "Image Generation",
          "value": 99.79,
          "source": "https://status.openai.com"
        }
      ]
    },
    {
      "key": "incident-entries-september",
      "title": "Status-page incident entries, September 10 to 19 2026",
      "measure": "Incident entries logged on the vendor status history in the ten-day window Sep 10 to 19 2026, all incident types",
      "unit": "incident entries",
      "rows": [
        {
          "key": "openai",
          "label": "OpenAI (status.openai.com)",
          "value": 20,
          "note": "Includes billing and support items; 30 entries Sep 1 to 19",
          "source": "https://status.openai.com/history"
        },
        {
          "key": "anthropic",
          "label": "Anthropic (status.anthropic.com)",
          "value": 5,
          "source": "https://status.anthropic.com"
        },
        {
          "key": "github",
          "label": "GitHub / Copilot (githubstatus.com)",
          "value": 5,
          "note": "Three of the five were AI-model-provider events",
          "source": "https://www.githubstatus.com"
        }
      ]
    },
    {
      "key": "time-to-resolve",
      "title": "Minutes from first post to resolved post, five September 2026 incidents",
      "measure": "Gap between the vendor's first status post and its resolved post for the incident, from the vendors' UTC-stamped timelines",
      "unit": "minutes",
      "rows": [
        {
          "key": "claude-sep10",
          "label": "Claude Sep 10 API latency",
          "value": 101,
          "note": "First post 21:43 UTC, resolved 23:24 UTC",
          "source": "https://status.anthropic.com"
        },
        {
          "key": "claude-sep11",
          "label": "Claude Sep 11 model errors",
          "value": 18,
          "note": "First post 14:19 UTC, resolved 14:37 UTC; vendor-stated impact 13:57 to 14:20 UTC",
          "source": "https://status.anthropic.com"
        },
        {
          "key": "github-sep13",
          "label": "GitHub Sep 13 several services",
          "value": 88,
          "note": "First post 09:16 UTC, resolved 10:44 UTC",
          "source": "https://www.githubstatus.com"
        },
        {
          "key": "github-sep17",
          "label": "GitHub Sep 17 Copilot OpenAI models",
          "value": 50,
          "note": "First post 20:59 UTC, resolved 21:49 UTC",
          "source": "https://www.githubstatus.com"
        },
        {
          "key": "github-sep20",
          "label": "GitHub Sep 20 pull requests",
          "value": 69,
          "note": "First post 22:13 UTC, resolved 23:22 UTC",
          "source": "https://www.githubstatus.com"
        }
      ]
    },
    {
      "key": "sept3-peak-reports",
      "title": "Downdetector peak reports by assistant, September 3 2026",
      "measure": "Peak Downdetector reports per platform during the September 3 2026 joint outage, as reported by shattered.io",
      "unit": "reports",
      "rows": [
        {
          "key": "chatgpt",
          "label": "ChatGPT",
          "value": 37000,
          "note": "More than 37,000; 66,000+ combined with Codex in some snapshots",
          "source": "https://shattered.io/chatgpt-claude-grok-outage-azure-2026/"
        },
        {
          "key": "grok",
          "label": "Grok",
          "value": 1365,
          "source": "https://shattered.io/chatgpt-claude-grok-outage-azure-2026/"
        },
        {
          "key": "claude",
          "label": "Claude",
          "value": 1324,
          "source": "https://shattered.io/chatgpt-claude-grok-outage-azure-2026/"
        },
        {
          "key": "gemini",
          "label": "Gemini",
          "value": 500,
          "note": "Approximate; stayed largely upright on Google Cloud",
          "source": "https://shattered.io/chatgpt-claude-grok-outage-azure-2026/"
        }
      ]
    }
  ]
}